Lubricating-pump for engines.



F. H. TREGO.

LUBRICATING PUMP FOR ENGINES.

APPLICATION FILED JUNE 23.19l5.

1,174,779. Patented Mar. 7,1916.

2 SHEETSSHEET I.

WITNESSES:

. A TTOR/VEY F. H. TREGO.

LUBRICATING PUMP FOR ENGINES.

APPLICATION FILED JUNE 23, I9I5- U 1 M 7T 7 H rs m B d 6%. t n7. 0L t a D1 I l I I I I l/I/I/E/VTOR fidmf/ifie a BY J ATTORNEY WITNESSES:

FRANK H. TREGO, GF SPRINGFIELD, MASSACHUSETTS.

LUBRICATING-PUMP FOR ENGINES.

Specification of Letters Patent.

Patented Mar. '7, 1916.

Application filed June 23, 1915. Serial No. 35,844.

'0 all whom it may concern:

Be it known that I, FRANK H. TREGO, a itizen of the United States. and a resident f. Springfield, in the county of Hampden nd State of Massachusetts, have invented new and Improved Lubricating-Pump for Tngines, of which the following is a full, lear, and exact description.

This invention relates to pumps designed or use in forced lubricating systems for ngines, and it has for its general objects provide a special form of pump that is nounted in the crank case of the engine, he pump being so designed as to be readily 'emovable or assembled, of durable and subvtantial construction and requiring comparitively little power for its operation.

A further object of the invention is the )rovision of a pump which is mounted on ;he bottom of the crank case in such a manier as to be readily removable, the pump )eing surrounded by a screen which is in- ;erted upwardly into the crank case through in opening in the bottom, and the bottom )f the screen is rovided with a plate which is bolted to the bottom of the crank case.

to form a closure for the said opening.

videa pump which is fastened to the upper section of the crank case and is driven from the cam shaft of the engine by a suitable driving connection which is so designed that the pump can be readily assembled or disasssembled without the necessity of taking the crank case apart, and in the upper section of the crank case is an outlet conduit which communicates with the discharge passage of the pump.

WVith these objects in view, and others which will appear as the description pro ceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawings, which illustrate one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, Figure 1 is a. sectional view of the pump and its operating means mounted in a crank case, the section being taken on the line 11, Fig. 3; Fig. 2 is a sectional view on the line 2-2. Fig. 3; Fig. 3 is a horizontal section on the line 33, Fig. 1; and Fig.

4 is a horizontal section on the line 44, Fig. 1.

Referring to the drawing, A designates the upper section of a crank casing, and B the bottom of the lower section, and mounted between these sections is a lubricating pump C of the cog gear type. This pump comprises a casing formed of an upper body section 1 and a lower bottom section 2 which are detachably connected by screws or equivalent means 3, the said casing being formed with a chamber 4 which contains the intermeshing gears 5 and 6, the teeth of which cooperate with the walls 7 to carry oil from the inlet port 8 to the discharge passage 9. The casing of the pump has an upwardlyextending web 10 that depends from the under side of a plate 11, which is removably secured to the upper section A of the crank case. Between the plate 11 and the pump casing is a conduit 12 that forms the discharge passage for the pump. The casing section 1, the web 10, plate 11 and conduit 12 may be a. single casting. The sections 1 and 2 of the pump casing have bearings 13, 13' and 14, 11 for the shafts 15 and 16, re spectively, on the gears 5 and 6. The shaft 15 extends upwardly through openings 17 and 18 in the plate 11 and bottom 19 of the crank case section A and is operatively connected with suitable driving means.

The oil is filtered before it enters the pump, the filtering means being a surrounding screen D which is supported on and arranged within a cage E, which may be a casting or other structure of suitable form. This cage is insertible through an opening 20 in the crank case, and it has its bottom so constructed as to form a plate 21 which closes the opening, the plate being secured to the bottom of the crank case by bolts or equivalent means 22, and at this joint fluidtightness is obtained by a gasket 23. The under side of the plate 11 of the pump structure has a groove 24 into which is set a felt or other packing 25 with which the top of the cage engages,so as to prevent sediment from being thrown into the strainer D. The bottoms of the ports 6 in the cage are located slightly above the bottom of the crank case so that sediment in the oil will have a chance to collect and not clog the screen I).

The pump is operated from the engine cam shaft 26 mounted in the usual manner in the upper section of the crank case, and a skew gear 27 thereon meshes with a skew gear 28 on the upper end of the shaft 15. A vertical bearing 29 is provided in the upper section of the crank case, and arranged therein is a bushing 30 through which the shaft 15 extends. This bushing has its upper surface countersunk so as to receive a lrallbearing 31 interposed between the bushing and the gear 28. This gear 28'has a squared opening into which the squared end 32 on the shaft 15 \extends,fand the'fit is such that when the pump structure is disconnected, the shaft' 15 will slip downwardly out of the gear 28 which rests on the ballbearing 31, which is in turn held bythe bushing 30. An opening 33 is provided in the top of the crank case and this opening is normally closed by a cap 34 which is in such close proximity'to the gear 28 as to prevent the latter from disconnecting from the pump shaft 15, and by means of the opensupply the various parts of the engine, and

in the web is drilled a passage 39 lined with a steel tube 40 which communicates at, its lower end with the discharge passage 9 of thepump, and which communicates with the outlet pipe 38. By hanging the pump in the upper half of the crank casing, pipe connections which are usually in the upper and lower halves of the crank casing are eliminated, such" pipe connections being substituted by the conduits 9, 39 and 40.

From the foregoing descriptiontaken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains,and while I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired as fall within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. The combination of an engine crank case with a lubricating pump mounted therein, said case having an opening in its bottom through which the pump 18 remov able, and a closure for the said opening.

2. The combination of an engine crank case with a lubricating pump mounted therein, said case having an opening in its bottom through which the pump is removable, and a screen surrounding the pump and having a bottom portion forming a closure for the said opening.

3. The combination of an engine crank case composed of upper and lower sections, a lubricating pump mounted in the lower section and removably secured to the upper section, and a screen surrounding the pump.

4. The combination of an engine crank case composed of upper and lower sections, a pump removably mounted on the upper section and depending therefrom, there being ,an opening in the lower section through which the pump is insertible and removable, and a closure for the said opening.

5. The combination of an engine crank case composed of upper and lower sections, a pump removably mounted on the upper section and dependingtherefrom, there being an opening in the lower section through which the pump is insertible and removable, and a screen surrounding the pump and supported by the lower section'and forming a closure for the opening thereof.

6. The combination of an engine crank case, a lubricating pump mounted therein and formed with a top plate, the bottom of the casing having an opening, a screen'surrounding the pump and removable through the said opening, the top of the screen being clamped to'the' .top plate of the latter, and

means for closing the opening'of the casing.

.7. The combination of an engine crank case, a pump in the bottomthereof, a screen surrounding the pump, the bottom of the case having an opening through which the pump and screen are removable, said pump and screen being separately fastened to.differentparts of the crank case, and means for driving the pump.

8. The combination 'of an engine crank case, a pump structure mounted therein and comprising a casing, a plate disposed abovev and connected with the pump casing, a discharge conduit between the plate and pump casing, a screen surrounding the pump structure, a packing between 'the top of the screen and plate of the pump structure, means for securing the pump structure in the crank case, and means for securing the screen in the crank case.

. 9. The combination of an engine cran case comprising upper and lower sections, a pump disposed in the lower section, and driving means mounted in the upper section, said pump including a shaft detachably connected with the driving means.

10. The combination of an engine crank case comprising upper and lower sections} the lower section having an opening, a lubricating pump insertible through the said opening and fastened to the upper section, said pump including a shaft extending into the upper section, a gear in the upper section with which the shaft engages or disengages during the installing or removing of the pump, a gear meshing with the firstmentioncd gear, and means for driving the second gear.

11. The combination of an engine crank case comprising upper and lower sections, the lower section having an opening, a lubricating pump insertible through the said opening and fastened to the upper section, said pump including a shaft extending into the upper section, a gear in the upper section with which the shaft engages or disengages during the installing or removing of the pump, a'gear meshing with the first-mentioned gear, means for driving the second gear, a bearing in the upper section for the said shaft, a cup adjacent the bearing to catch lubricant, and means for feeding lubricant from the cup to the bearing.

12. The combination of an engine crank case comprising upper and lower sections, the lower section having an opening, a lubricating pump insertible through the said opening and fastened to the upper section, said pump including a shaft extending into the upper section, a gear in the upper section with which the shaft engages or disengages during the installing or removing of the pump, a gear meshing with the first-mentioned gear, means for driving the second gear, a bearing in the upper section for the said shaft, a bushing in the said bearing having an upper countersunk surface, and a ballbearing set into the bushing and supporting the first-mentioned gear.

13. The combination of an engine crank case comprising upper and lower sections, a lubricating pump mounted in the lower section and secured to the upper section and having a discharge passage, the upper section including a web having an outlet passage registering with the discharge passage of the pump, and means in the upper section for operating the pump.

14.. The combination of an engine crank case comprising upper and lower sections, a .lubricating pump mounted in the lower section and secured to the upper section and having a discharge passage, the upper section including a web having an outlet passage registering with the discharge passage of the pump, means in the upper section for operating the pump, and a screen surrounding the pump and its discharge passage.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK H. TREGO. Witnesses:

FRED H. RICH, SIDNEY A. SAUNDERS. 

